<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Radial Partition Layout</title>
<meta name="description" content="Arrange people in rings around a central person, in layers according to distance from the central person." />
<!-- Copyright 1998-2019 by Northwoods Software Corporation. -->
<meta charset="UTF-8">
<script src="../release/go.js"></script>
<script src="../extensions/RadialLayout.js"></script>
<script src="../assets/js/goSamples.js"></script>  <!-- this is only for the GoJS Samples framework -->
<script id="code">
  var layerThickness = 70;  // how thick each ring should be

  function init() {
    if (window.goSamples) goSamples();  // init for these samples -- you don't need to call this
    var $ = go.GraphObject.make;  // for conciseness in defining templates

    myDiagram =
      $(go.Diagram, "myDiagramDiv", // must be the ID or reference to div
        {
          initialAutoScale: go.Diagram.Uniform,
          initialContentAlignment: go.Spot.Center,
          isReadOnly: true,
          maxSelectionCount: 1,
          layout: $(RadialLayout, {
            maxLayers: 5,
            layerThickness: layerThickness,
            rotateNode: function(node, angle, sweep, radius) {
              // all nodes are centered at the origin
              node.location = this.arrangementOrigin;
              // because the Shape.geometry will be centered at the origin --
              // see makeAnnularWedge, below
              node.diagram.model.setDataProperty(node.data, "angle", angle);
              node.diagram.model.setDataProperty(node.data, "sweep", sweep);
              node.diagram.model.setDataProperty(node.data, "radius", radius);
            }
          }),
          "animationManager.isEnabled": false
        });

    var commonToolTip =
      $(go.Adornment, "Auto",
        { isShadowed: true },
        $(go.Shape, { fill: "#FFFFCC" }),
        $(go.Panel, "Vertical",
          { margin: 3 },
          $(go.TextBlock,  // bound to node data
            { margin: 4, font: "bold 12pt sans-serif" },
            new go.Binding("text")),
          $(go.TextBlock,  // bound to node data
            new go.Binding("text", "color", function(c) { return "Color: " + c; })),
          $(go.TextBlock,  // bound to Adornment because of call to Binding.ofObject
            new go.Binding("text", "", function(ad) { return "Connections: " + ad.adornedPart.linksConnected.count; }).ofObject())
        )  // end Vertical Panel
      );  // end Adornment

    // define the Node template
    myDiagram.nodeTemplate =
      $(go.Node, "Spot",
        {
          locationSpot: go.Spot.Center,
          selectionAdorned: false,
          mouseEnter: function(e, node) { node.layerName = "Foreground"; },
          mouseLeave: function(e, node) { node.layerName = ""; },
          click: nodeClicked,
          toolTip: commonToolTip
        },
        $(go.Shape, // this always occupies the full circle
          { fill: "lightgray", strokeWidth: 0 },
          new go.Binding("geometry", "", makeAnnularWedge),
          new go.Binding("fill", "color")),
        $(go.TextBlock,
          { width: layerThickness, textAlign: "center" },
          new go.Binding("alignment", "", computeTextAlignment),
          new go.Binding("angle", "angle", ensureUpright),
          new go.Binding("text"))
      );

    function makeAnnularWedge(data) {
      var angle = data.angle;
      var sweep = data.sweep;
      var radius = data.radius;  // the inner radius
      if (angle === undefined || sweep === undefined || radius === undefined) return null;

      // the Geometry will be centered about (0,0)
      var outer = radius + layerThickness;  // the outer radius
      var inner = radius;
      var p = new go.Point(outer, 0).rotate(angle - sweep / 2);
      var q = new go.Point(inner, 0).rotate(angle + sweep / 2);
      var geo = new go.Geometry()
                    .add(new go.PathFigure(-outer, -outer))  // always make sure the Geometry includes the top left corner
                    .add(new go.PathFigure(outer, outer))    // and the bottom right corner of the whole circular area
                    .add(new go.PathFigure(p.x, p.y)  // start at outer corner, go clockwise
                        .add(new go.PathSegment(go.PathSegment.Arc, angle - sweep / 2, sweep, 0, 0, outer, outer))
                        .add(new go.PathSegment(go.PathSegment.Line, q.x, q.y))  // to opposite inner corner, then anticlockwise
                        .add(new go.PathSegment(go.PathSegment.Arc, angle + sweep / 2, -sweep, 0, 0, inner, inner).close()));
      return geo;
    }

    function computeTextAlignment(data) {
      var angle = data.angle;
      var radius = data.radius;
      if (angle === undefined || radius === undefined) return go.Spot.Center;
      var p = new go.Point(radius + layerThickness / 2, 0).rotate(angle);
      return new go.Spot(0.5, 0.5, p.x, p.y);
    }

    function ensureUpright(angle) {
      if (angle > 90 && angle < 270) return angle + 180;
      return angle;
    }

    // this is the root node, at the center of the circular layers
    myDiagram.nodeTemplateMap.add("Root",
      $(go.Node, "Auto",
        {
          locationSpot: go.Spot.Center,
          selectionAdorned: false,
          toolTip: commonToolTip,
          width: layerThickness * 2,
          height: layerThickness * 2
        },
        $(go.Shape, "Circle",
          { fill: "white", strokeWidth: 0.5, spot1: go.Spot.TopLeft, spot2: go.Spot.BottomRight }),
        $(go.TextBlock,
          { font: "bold 14pt sans-serif", textAlign: "center" },
          new go.Binding("text"))
      ));

    // define the Link template -- don't show anything!
    myDiagram.linkTemplate =
      $(go.Link);

    generateGraph();
  }

  function generateGraph() {
    var names = [
      "Joshua", "Daniel", "Robert", "Noah", "Anthony",
      "Elizabeth", "Addison", "Alexis", "Ella", "Samantha",
      "Joseph", "Scott", "James", "Ryan", "Benjamin",
      "Walter", "Gabriel", "Christian", "Nathan", "Simon",
      "Isabella", "Emma", "Olivia", "Sophia", "Ava",
      "Emily", "Madison", "Tina", "Elena", "Mia",
      "Jacob", "Ethan", "Michael", "Alexander", "William",
      "Natalie", "Grace", "Lily", "Alyssa", "Ashley",
      "Sarah", "Taylor", "Hannah", "Brianna", "Hailey",
      "Christopher", "Aiden", "Matthew", "David", "Andrew",
      "Kaylee", "Juliana", "Leah", "Anna", "Allison",
      "John", "Samuel", "Tyler", "Dylan", "Jonathan"
    ];

    var nodeDataArray = [];
    for (var i = 0; i < names.length; i++) {
      nodeDataArray.push({ key: i, text: names[i], color: go.Brush.randomColor(128, 240) });
    }

    var linkDataArray = [];
    var num = nodeDataArray.length;
    for (var i = 0; i < num * 2; i++) {
      var a = Math.floor(Math.random() * num);
      var b = Math.floor(Math.random() * num / 4) + 1;
      linkDataArray.push({ from: a, to: (a + b) % num, color: go.Brush.randomColor(0, 127) });
    }

    myDiagram.model = new go.GraphLinksModel(nodeDataArray, linkDataArray);

    // layout based on a random person
    var someone = nodeDataArray[Math.floor(Math.random() * nodeDataArray.length)];
    var somenode = myDiagram.findNodeForData(someone);
    nodeClicked(null, somenode);
  }

  function nodeClicked(e, root) {
    var diagram = root.diagram;
    if (diagram === null) return;
    // all other nodes should be visible and use the default category
    diagram.nodes.each(function(n) {
      n.visible = true;
      if (n !== root) n.category = "";
    })
    // make this Node the root
    root.category = "Root";
    // the root node always gets a full circle for itself, just in case the "Root"
    // template has any bindings using these properties
    diagram.model.setDataProperty(root.data, "angle", 0);
    diagram.model.setDataProperty(root.data, "sweep", 360);
    diagram.model.setDataProperty(root.data, "radius", 0);
    // tell the RadialLayout what the root node should be
    // setting this property will automatically invalidate the layout and then perform it again
    diagram.layout.root = root;
  }
</script>
</head>
<body onload="init()">
<div id="sample">
  <div id="myDiagramDiv" style="border: solid 1px black; background: white; width: 100%; height: 600px"></div>
  <p>
    Click on a Node to center it and show its relationships.
  </p>
  <p>
    The <code>RadialLayout</code> class is an extension defined at <a href="../extensions/RadialLayout.js">RadialLayout.js</a>.
    The override of the <code>RadialLayout.rotateNode</code> sets the <code>angle</code>,
    <code>sweep</code>, and <code>radius</code> data properties.
    Bindings in the node template use those properties to produce the appropriate <a>Shape.geometry</a>
    and the <a>GraphObject.alignment</a> and <a>GraphObject.angle</a> for each <a>TextBlock</a>.
  </p>
</div>
</body>
</html>